| Electrical Double Layer |
Article Index for Electrical |
Website Links For Electrical |
Information AboutElectrical Double Layer |
| CATEGORIES ABOUT ELECTRICAL DOUBLE LAYER | |
| surface chemistry | |
|
HISTORICAL DEVELOPMENT OF DOUBLE LAYER MODELS The earliest model of the electrical double layer is usually attributed to Helmholtz ( 1879 ). Helmholtz treated the double layer mathematically as a simple capacitor, based on a physical model in which a single layer of ions is adsorbed at the surface. Later Gouy and Chapman ( 1910 - 1913 ) made significant improvements by introducing a diffuse model of the electrical double layer, in which the potential at a surface Decreases Exponentially due to adsorbed counter-ions from the solution. The current classical electrical double layer is the Gouy-Chapman- Stern model, which combines the Helmholtz single adsorbed layer with the Gouy-Chapman diffuse layer. Important approximations used in this model are:
|
|
|